Perpetual calendar



1960 M. c. GLEERUP-MQLLER 2,947,102

I PERPETUAL CALENDAR Filed. Aug. 18, 1958 3 Sheets-Sheet 1 F/' 7 g- 1960 M. c. GLEERUP-MQLLER 2,947,102

PERPETUAL CALENDAR 3 Sheets-Sheet 3 Filed Aug. 18', 1958 PERPETUAL CALENDAR Magdalin Christian Gleerup-Mgller, Biilowsvej 9, Copenhagen, Denmark Filed Aug. 18, 1958, Ser. No. 755,536

Claims. 01. 40-115 The invention relates to a perpetual calendar so designed that when once adjusted it may by one daily pull on a handle be made to show the day, the date and the name of the month.

Many constructions of such perpetual calendars are known in which. out of regard to the diiferent number of days in the months and the different number of days in February, according as it is a question of an ordinary year or a leap year, it'has been necessary to make use of many intricate, automatical mechanisms in order to ensure that by a single pull on the handle the calendar will be set to give the correct reading in all cases. Such calendars will, however, be rather expensive due to their involved construction and wili therefore not be available for general use, although the demand for perpetual calendars, which may be set by a single pull on the handle, is considerable. It is. the object of the present invention to provide a perpetual calendar fulfilling the requirements set and capable. of being manufactured so cheaply that it may be used by everyone. According to' the invention this object is achieved by providing the perpetual calendar, which consists of a frame with a window, a day disc, a date disc and a month disc, partially visible through the window, with a handle for the simultaneous setting of the day and date discs and a second handle with tips for the simultaneous setting of month, date and day discs. By this arrangement the result is achieved that by means of the first handle it will be, possible dailyto advance the day and date discs by one step, while'by means of the second handle, whichis provided with tips for the simultaneous setting of month, day and date discs, a single manipulationwill onthe first day of a r'nonthadvance the day disc'one step, set the date disc to show the figure l, and move the month disc one step forward, irrespective of whether the date disc on the previous day stood at 28, 29, 30 or 31. 'In this manner it will be possible by manipulation of the second handle, which may be termed the month handle of the calendar, to make a simultaneous setting of the name of the month,'the day disc and the date discs. I

The desired efliect is attained by the first operation handle being provided with a tip with devices engaging a first set of coupling media on the day disc and date discs, whereas the second handle, or month handle has a tip with devices engaging coupling media on the month disc and with another set of coupling media on the day and date discs. I i

To make it possible to show the date in large figures, it will be expedient to use two discs to indicate the date, one with the figures 0-9 for the last digit and a transparent disc witlrblank fields and figures 1-3 for the tens in the date. For this purpose the latter disc may be produced of transparent material, but may as an alternative befprodhced of opaque material provided with suitable notches through which the figures of the lastdigit disc situated behind it may be seen.

An embodiment of a perpetual calendar according to the invention is shown in the drawing, in which Fig. 1 shows the back-plate of the frame seen from the rear,

Fig. 2 the same in front elevation,

Fig. 3 the day-disc in front elevation,

Fig. 4 the same with a spacer disc laid on,

Fig. 5 the same with also a last-digit disc laid on,

Fig. 6 the same with a spacer disc laid on,

Fig. 7 the same with a disc showing the tens of the date laid on,

Fig. 8 the same with the month-handle in place,

Fig. 9 the front plate of the frame in rear elevation and with the month disc mounted in place, and

Fig. 10 the assembled calendar in front elevation.

The perpetual calendar consists of a frame in the shape of a square or rectangular box provided at front with a front plate 1 with a window 11, as shown in Fig. 10, and closed at back by a rear plate 2 with an opening 21. On the back of the rear plate 2 a tip 3 a is turnably mounted and provided with a head 31 which through the opening 21 protrudes from the front of the rear plate 2, so that the head, as described in detail in the following, may engage the discs of the calendar. The tip 3 is turnably mounted on an axle 22 which carries the greater part of the discs mounted in the calendar. 'The tip 3 is actuated by a spring 32 which tends to maintain it inthe position shown in the drawing. It is further by means of a cord 33 connected with a handle 34,-so that by a pull on the handle 34, the tip 3 and its head 31 may be made to describe an arc, as will be ex plained in detail below. The head 31 is turnably connected with the tip 3 being mounted on a tappet 35 thereon, and is actuated by a spring 36 which tends to force the head 31 forward in the direction indicated by arrows 37. The head 31 has two teeth 38 and 39 which, as will be described below, are designed to engage coupling media in the form of teeth on the turnable discs of the perpetual calendar.

Closest to the rear plate 2 axle 22 bears a day disc 4, as shown in Fig. 3. The names of the days are placed along the circumference of this disc. in the drawing the name of-only one day, Friday, is shown. The name is so large as to take up about of the circumference of the disc. The disc is provided with two coupling media, namely partly teeth 41, one tooth for each day for engagement with tooth 38 on the head 31, and partly a set of notches 42 limited by spokes 43, the object of which will be described below. These notches 42 and spokes 43 are situated right above an opening 23 in the I rear plate 2.

In front of the day disc 4 a spacer disc 5 is inserted on axle 22 and provided with a laterally projecting web 51 held by a pin 24 on the rear plate 2 so that it cannot turn. The spacer disc 5 is not quite circular but has a notch 52 limiting a stop 53 for the tooth 39 on head 31, so that the head cannot swing beyond the stop 53. when the head 31 is being swung and the tooth 38 impinges against one of teeth 41 on the day disc 4, its

motion will be stopped when tooth 39 strikes stop 53..

Thereby the day disc will always be stopped in a given position so that one of the names of the days may be viewed plainly through the window 11 in the front plate of the frame. The spacer disc 5 is further provided with a notch 54 situated just above some of notches 42 in the day disc 4, so that the latter will be visible through notch 54.

In front of the spacer disc 5 the last-digit disc 6 of the date is placed, as shown in Fig. 5. Along the-circumference of this disc thefigures 0-9rare, printed,'so.. that below the name of the day they may be plainly seen through window 11. In the drawing only figures Patented Aug. 2, 1960.

and 9 are shown. This last-digit disc is provided with ten teeth 61 along its circumference and so placed that they will be carried forward by tooth 39 on the head 31 when the latter is being turned. Teeth 61 are not uniform, but the tooth engaged by tooth 39 on head 31 when the figure 9 is visible through the window 11, as shown in the drawing, is lower than the rest of the teeth, so that tooth 39 actuated by its spring 36 will be closer to axle 22 when tooth 39 is iii-engagement withthis tooth than when it is engaging the other teeth. The disc is further provided with a notch 62 through which part of notch 54 and notches 42 may be seen.

On the front side of plate 6 a spacer plate 7 is mounted, provided with a lateral web 71 .which is held in place by a pin 24. The spacer plate is provided with a notch 72 through which one of the figures on the last-digit disc 6 will be visible and with a notch 73 which partially coincides with notch 62 and through which notches 42 and spokes 43 may be seen. Disc 7 is not entirely circular but has a notch 74 abreast of the track of tooth 39 and a stop 75 in way of stop 53.

On the front of the spacer plate 7 the first-digit disc 8 for the date is mounted. 'In the embodiment shown this disc is made of transparent material so that the figure on the last-digit disc 6 showing in the notch 72 will be visible through it. The first-digit disc bears the figures l-3 and an open space. The figures are placed in two rows, so that the disc will on an average have to make only A; of a turn for the changing from one figure to another. The teeth 81 used for the changing of the figures are not, however, placed at regular intervals but so that the visible figure of the first-digit disc will be in correct position in relation to the figure on the last-digit disc. The first-digit disc 8 is provided with two notches 82 which in part coincide with notch 73.

In front of disc 8 a handle 9, the so-called month handle, is mounted and by means of a tappet 91 turn ably connected with tipping disc 92 turning on axle 22.

The tipping disc 92 bears partly a spring-loaded tooth 93,

passing down through notches 82, 73, 62, 54, 42, and 23 sothat it may engage the edges of notches 82 in the first digit disc 8, the extreme edge of notch 62 in the lastdigit disc 6 and one of the spokes 43 of disc 4, and partly a spring-loaded tooth 94, which, as will be described in detail in the following, may engage the month disc.

The handle 9 has a hole 95 into which a finger may be'insertcd when the handle is to be manipulated and a hole 96 engaging a spring 25 on the back of the rear plate 2. The spring 25 will tend to keep the handle 9 in the position shown in the drawing.

As shown in Fig. 9 the back of the front plate 1 has a tappet 12 hearing a'month disc 13 with twelve notches 14 and showing on the front facing the window 1-1 the names of the months. Between the front plate 1 and disc 13 a spring-loaded counter 'pawl 15 is mounted and engages one of notches 14 to prevent backing of disc 13. Notches 14 are so placed that pawl 94 on the tip 92 may engage them and turn the disc one step forward when handle 9 is pulled down.

When handle 34 is pulled so far that the head 31 is stopped by the tooth 39 impinging against stops 75 and 53, tooth 38 will pull the day disc 4 one step forward. At the same time tooth 38 will advance the last-digit disc 6 one step. Thereby the name of the day and the date will be changed one step forward. If the last-digit disc shows figure 9 through the window 11, tooth 39 will, as mentioned above, have been pulled so far down towards axle 22 that it will engage also one of teeth 81 on the first-digit disc 1, so that the latter will be changed one step forward while at the same time the last-digit changes from 9 to O.

This operation maybe performed unchanged day by dayuntil the last day of themonth. When it has been reached and the reading of the calendar is to be changed, the month handle 9 must be manipulated. Thereby tooth 94 engaging one of the notches 14 on the month disc 13 will be pulled one step forward so that the name of the month will be changed. Furthermore, tooth 93 will through the above-mentioned notches engage the day disc 4, the last-digit 6 and the first-digit disc 8 and pull them so far forward that the date will change to 1. The last-digit disc 6 Will irrespective of whether it is showing figures 8, 9 or 0 be turned to show figure 1, the extreme edge of notch 62 being so placed in relation to the extreme edge of notch 54 in the spacer disc 5 acting as a stop for tooth 93, that this tooth, whenever it engages notch 62, will pull disc 6 forward to show figure l. correspondingly, the extreme edge of notch 82, is so placed in relation to the edge' of notch 82 is so placed in relation to the edge of notch 54 that the tip 92 by tooth 93 always will move the first-digit disc 8 so far forward that an open space on disc 8 will be visible through the window 11 when the month handle 9 is manipulated to turn the discs. The result is, that regardless of whether the last day of the previous month was the 28th as in February of an ordinary year, 29th as in a leap year, 30th as in some of the months, or 31 as in the rest of the months, the date will be changed to the 1st of the next month, while at the same time the name of the day will advance one step, when month handle 9 is manipulated.

It is expressly pointed out that the embodiment chosen constitutes only an example and that the disc, the tips, the external shape of the frame and the mounting and design of the tips all may be varied in many dilferent ways without coming outside the scope of the invention, More particularly it may be pointed out that the month disc may be mounted 'in a manner different from the one shown on the back of the front plate of the frame. Furthermore, the first-digit disc 8 may instead of being transparent, as presumed in the example, be provided with notches permitting the reading of the figures of the last-digit disc through the first-digit disc even if the latter is of opaque material.

I claim:

1. Perpetual calendar comprising in combination a frame with a window, a day disc, date discs and a month disc bearing legends part of which is visible through the window, a first handle for the simultaneous setting of the day and date discs and another handle with tips for the simultaneous setting of the month disc, the date'discs and the day disc. I

2. Perpetual calendar comprising in combination a frame with a window, a day disc, date discs and a month disc bearing legends partially visible through the window, a first handle with a tip with mechanisms for engagement with a first set of coupling media on the day disc and the date discs, and another handle with a tip with mechanisms for engagement with coupling media on the month disc and another set of coupling media on the day disc and the date discs.

3. Perpetual calendar according to claim 2 in which an opaque disc with figures 09 is used for the last-digits and a transparent disc with blank spaces and the figures 1-3 for the first digit of the date.

4. Perpetual calendar according to claim 3, in which the first-digit disc of the date is made of transparent material.

5. Perpetual calendar according to'claim 3, in which the first-digit disc of the date is made of opaque material provided with notches through which the figures of the last-digit disc are visible.

References Cited in the file of this patent UNITED STATES PATENTS 

